General and administrative expenses (Details) - CHF (SFr)
SFr in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
General and Administrative Expenses      
Occupancy expenses SFr 979 SFr 982 SFr 1,090
IT, machinery, etc. 1,549 1,428 1,343
Provisions and losses 1,491 1,261 640
Travel and entertainment 149 152 337
Professional services 1,996 1,546 1,712
Communication and market data services 520 512 522
Amortization and impairment of other intangible assets 8 8 10
Other 467 634 474
General and administrative expenses 7,159 6,523 6,128
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component (166) (159) (204)
Bank      
General and Administrative Expenses      
Occupancy expenses 893 883 990
IT, machinery, etc. 1,218 1,129 1,066
Provisions and losses 1,489 1,253 639
Travel and entertainment 127 134 303
Professional services 3,625 3,025 3,132
Communication and market data services 458 458 465
Amortization and impairment of other intangible assets 8 8 10
Other 763 1,072 983
General and administrative expenses 8,581 7,962 7,588
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component SFr 10 SFr 0 SFr 10